Printing-press.



J. B. REPLOGLE. PRINTING PRESS.

APPLICATION FILED JUNE 28, 1913.

191275,68@ Patented Feb. 9, 191.5. @LQ/ ,T8 j? narran .srarns ramena*arriba.

JAMES B. REPLOGLE, 0F CHICAGO, ILLINOIS.

PRINTINGPRESS.

Application led J-,une 28, 1913.

T0 all whom it may concern:

Be it known that I, ,LAMES B. REPLoGLn, citizen of the United States,residing at Chr cago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Printing-Presses, ofwhich the following is a full, clear, concise, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification.

My invention relates to printing presses and relates more particularlyto the tympan cylinder portions thereof, the invention havingifor itsobject the provision of mecha-- nism which will tighten the tympan uponits cylinder without permitting material circumferential creepage of thetympan. l

I will explain my invention fully by reference to the accompanyingdrawing show ing two embodiments thereof and in Which-,-

Figure 1 is a sectional view on line 1 1 of Fig. 2; Fig. 2 is asectional view on line 2 2 of Fig. l; Fig. 3 is a detail showing some ofthe parts of Fig. 1 in another adjustment; Fig. et is a detail view online 4 4 of Fig. 5; and Fig. 5 is a view in elevation.

Like parts are indicated by similar characters of reference throughoutthe different figures.

p The cylindrical body portion a of the tympan cylinder is provided withthe usual end plates l) having supporting shafts o, all 1n accordancewith usual or desirable practice. The cylindrical portion a is providedwith the usual or suitable longitudinal slot or gap d.

Referring rst to Figs. 1 to 5 inclusive, a reel rod e is located in gapd and extends longitudinally of the cylinder, this rod bev ing journaledin the cnd plates c. The reel rod is narrower than the gap and ismounted between and spaced apart from the longitudinal sides of the gapwhereby access may readily be had thereto for the purpose of introducingthe ends of the tympan to the slot in the reel rod. Said rod ispreferably located nearly central within the gap d and well within theperiphery of the cylinder. The tympan f, which serves as a basis foroverlayin and cutting out to improve the quality of the press work, isof any usual or suitable formation, its ends` being passed Specificationof Letters Patent.

Patented Feb. 9, 1915.

serial No. 776,216.

through a slot in rod e, a packing g intervening between the tympan andthe cylindrical wall a. As viewed in Fig. 1, the rod e may be turned ina counter clock-wise direction by means of a pin when inserted withinthe radial holes lz in the rod e; Return movement of the rod e isprevented by means of a well known brake or clutch mechanism includingballs t' pressed inwardly against the rod e by springs k held in placeby abutment screws Z. A tapered pin inserted in holes fm, will lift andrelease the balls. When the reel rod is turned, it tightens the tympanupon the tympan cylinder, but in so doing it simultaneously pulls withequal force in opposing and approaching directions upon both ends of thetympan (rather than upon both ends in the same direction as hitherto)whereby the tympan is tightened upon its cylinder without causingmaterial circumferential slippage of the tympan with respect to itssupporting cylinder. The preparation of the tympan cylinder for theimprovement of the press work is thus, by means of my invention, notmarred by tightening the tympan, though the invention is not to belimited to this utility.

It will be observed that the ends of the tympan initially haveengagement with diametrically opposite sides of the single reel rod,since the ends of the tympan are passed in opposing directions into theslot in the rod. By this arrangement the ends of the tympan areimmediately drawn toward each other in opposing directions when windingmovement 1s initially imparted to the reel rod, the end portions of thetympan being tangential with respect to the diametrically oppositeportions of the reel rod.

While I have shown and particularly described the preferred constructionembodying my invention, I do not wish to be limitedA gap and which ismounted between and tions upon Winding movement being impartspaced apartfrom the longitudinal sides of ed to the reel rod.

the gap und adjacent the tympan where it In witness whereof, I hereuntosuhseribe extends across the gap, end portions of the my nume this 26thday of June A. D., 1913. 5 tympan being tangential with respect t0 JAMESB. REPLOGLF@ opposite portionsof the reel rod whereby Vitnesses:

the ends of the tympanre simultaneously G. L. CROGG,

drawn toward each other in opposing direc- ETT, L. WHiTE.

